<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

<style>
    div{
        width: 100px;
        height: 100px;
        background-color: aqua;
        margin: 100px auto;
        
    }
</style>
</head>
<body>
<div> 
</div>
<script>
       var ele = document.querySelector('div');
       console.log(ele);
       console.log(111);
ele.onclick = function (){
    console.log('我被点击了');
    console.log(typeof ele);

 }
var name = "徐文笛\n呜呜呜呜";
var age = "18";
console.log(name+age);

var a = "hello";
var b = "word";
var c = b;
var b = a;
var a = c;
console.log(a)
console.log(b)



    </script>




</body>
</html>